(Brian) Emil Hartz hartzis

let meEnjoy = usePondering(react)

hartzis / EventHelpers.js

Created January 18, 2017 04:25

Touch Event React Jest Enzyme Helpers

	function createClientXY(x, y) {
	return { clientX: x, clientY: y };
	}

	export function createStartTouchEventObject({ x = 0, y = 0 }) {
	return { touches: [createClientXY(x, y)] };
	}

	export function createMoveTouchEventObject({ x = 0, y = 0}) {
	return { changedTouches: [createClientXY(x, y)] };

hartzis / FeatureFlags.jsx

Last active October 25, 2018 20:48

featureFlag component examples



	/*
	* # 1
	* HOC for retrieving and setting a featureFlag prop
	*/
	const withFlag = (name) => compose(
	connect((state) => {
	const value = featureFlagSelector(state, { featureFlag });
	return { featureFlag, featureFlagValue };

hartzis / restify-proxy.js

Last active August 3, 2023 19:18

Restify proxy pattern using http-proxy. Uses restify server.pre() to setup a pattern to handle proxy requests before all middleware.

	/*
	* "restify": "^7.2.0",
	* "http-proxy": "^1.17.0",
	*
	* The restify server will proxy requests that match keys in a `proxies` config.
	*
	*/
	const restify = require('restify');
	const httpProxy = require('http-proxy');

hartzis / Experiments.jsx

Last active January 31, 2019 21:23

A/B Testing react, experiment(s)

	/*
	* Component for displaying an experiment and bucket(s)
	*/

	/*******************************
	* Option 1a - prop renders based on bucket names, ~ mimics <Flag />
	*/
	<Experiment
	name="exp:test-message"
	bucketA={({ recordInteraction }) => (<Message color="blue" onClick={() => recordInteraction('click')}>Welcome!</Message>)}

hartzis / batchThrottleAsyncRequests.js

Last active March 3, 2022 00:42

batch and throttle async requests node/js

	const MAX_BATCH_SIZE = 10;
	const WAIT_TIME_MS = 1000;

	const makeRequest = async (id) => {
	try {
	await fetch(`/api/${id}`)
	} catch(error) { }
	}

	const batchesOfIds = _.chunk(Ids, MAX_BATCH_SIZE);

hartzis / gist:54e1ff87a08fbb463b0483f02850e9df

Last active September 10, 2020 19:15

Set and Map lookup example


	const interestSurcharge = new Set(['AL']);
	const flagshipOriginationFee = new Set(['AK', 'AZ', 'AR', 'CA', 'CO', 'CT', 'DE', 'DC', 'FL', 'GA', 'HI',
	'ID', 'IA', 'KS', 'KY', 'LA', 'ME', 'MS', 'MO', 'NM', 'ND', 'OH', 'OR',
	'RI', 'SC', 'SD', 'UT', 'VA', 'WV', 'WI', 'WY']);
	const documentPreparation = new Set(['IL']);
	const nonrefundablePrepaidFinanceCharge = new Set(['IN']);
	const notApplicable = new Set(['MD', 'MA', 'MN', 'MT', 'NV', 'NH', 'NJ', 'NY', 'NC', 'PA', 'VT']);

	const feeNameMap = new Map([